:root {
  color-scheme: light dark;
  --fg: #1a1a1a;
  --bg: #fafafa;
  --card: #ffffff;
  --accent: #0a7d4f;
  --muted: #6b7280;
  --border: #e5e7eb;
  --error: #b91c1c;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #ededed;
    --bg: #111418;
    --card: #1a1f25;
    --accent: #34d399;
    --muted: #9ca3af;
    --border: #2d333b;
    --error: #f87171;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
}
main { max-width: 560px; margin: 0 auto; }
h1 { font-size: 1.4rem; }
h2 { font-size: 1.1rem; margin-top: 1.8em; }
h3 { font-size: 0.95rem; color: var(--muted); }
.badge {
  font-size: 0.65rem;
  vertical-align: middle;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 999px;
  padding: 2px 8px;
}
section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 12px 0;
}
label { display: block; margin: 10px 0; font-size: 0.9rem; }
input {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
}
button {
  padding: 10px 18px;
  margin-top: 10px;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button.ghost { background: transparent; color: var(--accent); }
button.small { padding: 4px 10px; font-size: 0.8rem; margin: 0 0 0 8px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.status { font-weight: 600; }
.note { color: var(--muted); font-size: 0.85rem; }
.secret { font-weight: 600; color: var(--accent); }
.message {
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  font-size: 0.9rem;
}
.message.error { border-color: var(--error); color: var(--error); }
ul { padding-left: 0; list-style: none; }
li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
footer { margin-top: 24px; color: var(--muted); font-size: 0.8rem; }
code { font-family: ui-monospace, monospace; }